Sodium in low-rank coal
Conference
·
OSTI ID:6458284
An important parameter used to determine quality of many low-rank coals is the sodium content of the coal ash. During combustion sodium captures sulfur and forms a layer on boiler heat exchange surfaces that is the precursor to the formation of ash fouling deposits. Once the deposit starts to form, sodium acts as a fluxing agent to lower the melting point of ash particles which aids in binding the particles together to strengthen the deposit. The association of the sodium in the coal may aid in determining the association of the sodium in the deposit. However, because of the possibility of the volatilization of some inorganics that are associated with the organic matter in low-rank coals, the measurement of the sodium concentration in coal ash may not be truly indicative of the sodium concentration of the coal. Therefore, to accurately determine the effect of sodium on the formation of ash fouling deposits, it is suggested that the sodium concentration be measured directly in the coal by using acid digestion and subsequently analyzing the digest. 11 refs., 5 figs.
- Research Organization:
- North Dakota Univ., Grand Forks (USA). Energy Research Center
- DOE Contract Number:
- FC21-83FE60181
- OSTI ID:
- 6458284
- Report Number(s):
- DOE/FE/60181-176; CONF-860219-1; ON: DE86003912
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
01 COAL, LIGNITE, AND PEAT
010600* -- Coal
Lignite
& Peat-- Properties & Composition
ABSORPTION SPECTROSCOPY
ACTIVATION ANALYSIS
AIR HEATERS
ALKALI METAL COMPOUNDS
BOILERS
BROWN COAL
CARBONACEOUS MATERIALS
CHEMICAL ANALYSIS
CHEMICAL COMPOSITION
CHEMICAL REACTIONS
CHEMICAL STATE
COAL
COAL RANK
COMBUSTION
DEPOSITS
ELECTRON MICROPROBE ANALYSIS
ENERGY SOURCES
FLUIDS
FOSSIL FUELS
FOULING
FUELS
GASES
HEATERS
LIGNITE
MATERIALS
MICROANALYSIS
MINERALS
NONDESTRUCTIVE ANALYSIS
OXIDATION
PULVERIZED FUELS
RECOMMENDATIONS
SODIUM COMPOUNDS
SPECTROSCOPY
SUBBITUMINOUS COAL
THERMOCHEMICAL PROCESSES
VAPORS
X-RAY EMISSION ANALYSIS
X-RAY FLUORESCENCE ANALYSIS
010600* -- Coal
Lignite
& Peat-- Properties & Composition
ABSORPTION SPECTROSCOPY
ACTIVATION ANALYSIS
AIR HEATERS
ALKALI METAL COMPOUNDS
BOILERS
BROWN COAL
CARBONACEOUS MATERIALS
CHEMICAL ANALYSIS
CHEMICAL COMPOSITION
CHEMICAL REACTIONS
CHEMICAL STATE
COAL
COAL RANK
COMBUSTION
DEPOSITS
ELECTRON MICROPROBE ANALYSIS
ENERGY SOURCES
FLUIDS
FOSSIL FUELS
FOULING
FUELS
GASES
HEATERS
LIGNITE
MATERIALS
MICROANALYSIS
MINERALS
NONDESTRUCTIVE ANALYSIS
OXIDATION
PULVERIZED FUELS
RECOMMENDATIONS
SODIUM COMPOUNDS
SPECTROSCOPY
SUBBITUMINOUS COAL
THERMOCHEMICAL PROCESSES
VAPORS
X-RAY EMISSION ANALYSIS
X-RAY FLUORESCENCE ANALYSIS